Global Warming and Ozone Depletion Global warming is a gradual increase in the overall temperature of the Earth's atmosphere generally attributed to the greenhouse effect caused by increased levels of carbon dioxide , chlorofluorocarbons and other pollutants. One of the biggest issues that is currently taking place in global warming is depletion of the ozone layer and human activities are part of the blame. The ozone layer is a layer in the earth stratosphere that contains a high concentration of ozone which is meant to absorb most of the ultraviolet radiation from the Sun that is reaching the earth. The effects of global warming can bring about both ecological and social changes that are caused by human emissions of greenhouse gases. Greenhouse gases are gases that contribute to absorbing infrared radiation, carbon dioxide, and chlorofluorocarbon. There is a theory that the climate change is occurring and that human activities could be the primary driver. Many people around the world are aiding in the destruction of our ozone layer. Human activities such as polluting the air with toxins and gases from industrial facilities and motor vehicles among other things are causing our ozone layer to weaken, these issues and other problems are leading to the depletion of our ozone layer. Ozone depletion is becoming a widespread concern because it effects all living things on earth. The pollution that is being released into the air contains high levels of chemicals such as chlorine and bromine which are two of the main contributors to the reduction and quantity of our ozone layer and causing this widespread concern .The main issue with ozone depleting substances such as chlorine and bromine is that they effect the stability of the ozon... ... middle of paper ... ... could produce enough ozone fast enough or in large enough quantities to help replace the natural ozone production process. Over time, stratospheric chlorine and bromine will combine with other chemicals and eventually fall back to Earth. That's the point of ending production of these chemicals under the Montreal Protocol and the Clean Air Act. The good news is that the stability works both ways. In our bucket, narrowing the hole allows the water inside to rise to a higher stable point. Similarly, by ending production of ozone depletes, we allow natural processes to remove excess chlorine and bromine, which slows the ozone destruction reactions to normal speeds, and the production process will have the chance to restore the ozone layer to normal levels. Scientists expect that with full compliance with the Montreal Protocol, the ozone layer will heal by about 2050.
Global warming is described as an increase of average temperature throughout the globe over an extended period of time. Typically when scientists use the term global warming they use it to describe rising temperatures due to human actions such as the burning of fossil fuels and release of aerosols into the atmosph...
15.2) The accumulation of chlorofluorocarbons is responsible for depleting the atmospheric zone. The atmospheric zone has changed in concentration due to human activity. The CFCs release chlorine atoms which react with ozone reducing it to molecular O₂. Following chemical reactions release the chlorine which reacts with other ozone molecules in a catalytic chain reaction. The ozone layer is getting thinner and thinner as stable air at places such as Antarctica allows reaction to continue. The accumulation of CFCs has led to increased UV radiation in sunlight reaching the earth thereby decreasing ozone levels. The global temperature has increased.
As the twenty-first century progresses, it has become increasingly apparent just how many challenges the world faces. Prominent among these concerns are environmental issues, in particular, ozone depletion and climate change. While the international community has been exceptionally successful in its struggle to reduce the production and consumption of chlorofluorocarbons (CFCs), the organic compounds that contribute to the ozone issue, its efforts to tackle climate change have yielded considerably fewer advancements. A number of factors that helped the proceedings of the ozone regime, or campaign, are not applicable to the climate change regime. The issue of limiting CFCs was much less politically and economically charged than that of reducing greenhouse gases (GHGs), which cause the greenhouse effect and the consequent warming of the planet. Climate change has been referred to as the ultimate “tragedy of the commons”, an important metaphor in economics that helps explain why this subject is still at the centre of much heated debate and has yet to be resolved in a manner similar to that of the ozone problem.
Stratospheric ozone absorbs 97-99% of ultraviolet radiation. As this protective layer continues to dissentigrate, human health will suffer. One American dies every hour from skin cancer, a direct result of ozone depletion by anthropogenic chemicals, primarily CFCs, which damage the ozone layer. Alternate chemicals are now being used in the place of CFCs that will not damage statospheric ozone, and there is international recognition of the importance of developing these chemicals. The Montreal Protocol is an international treaty which limits the production of ozone depleting substances. Still, human health is at risk from the deletion of ozone, and the risk factor will continue to rise unless people and industries become more aware of the implications connected with everyday use of chemicals which destroy stratospheric ozone.
This article states that the ozone hole is diminishing. The credit for this good news is the phasing out of the ozone-depleting chemicals sponsored by the Montreal Protocol (Ozone hole diminishing, Nov). According to this article, the hole reached a peak of 25 million square kilometers, coming down from 28 in previous years since 1998 up to 2006. The article emphasizes the fact that ozone-depleting gases are still being used. The article continues by stating that according to the World Meteorological Organization, the planet will come back to pre-ozone hole conditions between 2060 and 2075 (Ozone hole diminishing, Nov).
Global warming, or climate change is a gradual increase in average temperature of the Earth’s atmosphere and its’ oceans. It is thought that global warming is permanently changing the climate. So, how exactly does global warming increase the Earth’s average temperature? Well, it is done by something called the greenhouse effect. When the sunlight hits our atmosphere the greenhouse gases only allows so much sunlight into the atmosphere while redirecting the rest back into space. This is what keeps Earth from being too hot or too cold. When people are adding pollution to the air – the burning of fossil fuels – they are actually destroying the ozone layer. If the ozone layer
The depletion of the ozone layer has been a trending topic after it was first discovered in 1970. The ozone layer is a portion of the earth’s stratosphere which absorbs most of the sun’s UV rays hence preventing cancer and other fatal illness to the skin. It contains high concentrations of O3 and at a constant rate is being broken down and. Since 1970, it has been discovered that about 4% of the ozone layer wears off every decade and is as a result of day-to-day human activity.
...depletion of the ozone layer, biodiversity and stress on food producing systems(IPCC 2013). Therefore, climate change is highly risky and the appropriate international steps should be taken in order to stop more climate change and its negative and severe consequences.
Global warming has been a continuous problem that has escalated over time on our planet Earth. The main cause of global warming is because Carbon dioxide and other warming pollutants are gathering in the atmosphere and laying over it like a thick sheet as well as its effect on the ozone layer. This is trapping the sun's heat and causing the planet to grow increasingly warmer as well as a variety of other weather shifts. Over the past 50 years, Earth’s tem...
Human depletion of the Earth’s ozone has contributed to the flow of pollution. (Rowlands, 1991). Many materials used by humans and factories can be naturally transported by either air or water. Oftentimes the materials that should be naturally transported can begin to degrade chemically in the physical environment (Rowlands, 1991). As materials left behind as a result of the population waste deteriorate, it can then begin to affect the crops from agriculture, contaminate the drinking water, and reduce the growth of plants and trees.
In 1970, Crutzen first showed that nitrogen oxides produced by decaying nitrous oxide from soil-borne microbes react catalytically with ozone hastening its depletion. His findings started research on "global biogeochemical cycles" as well as the effects of supersonic transport aircraft that release nitrogen oxide into the stratosphere.2 In 1974, Molina and Rowland found that human-made chlorofluorocarbons used for making foam, cleaning fluids, refrigerants, and repellents transform into ozone-depleting agents.3 Chlorofluorocarbons stay in the atmosphere for several decades due to their long tropospheric lifetimes. These compounds are carried into the stratosphere where they undergo hundreds of catalytic cycles with ozone.4 They are broken down into chlorine atoms by ultraviolet radiation.5 Chlorine acts as the catalyst for breaking down atomic oxygen and molecular ozone into two molecules of molecular oxygen.
Global Warming is a condition caused by greenhouse gases and human activities. The increased concentration of greenhouse gases due to activities such as deforestation and fossil fuel burning is causing the Earth’s atmosphere and oceans to warm up. As a result of this, global warming has some serious effects in the shape of extreme weather, species extinctions, and rising sea levels. These effects can contribute to the changes that are taking place all over the world, most of which are dangerous enough to pose a threat to the survival of life on Earth in the future.
Global warming is the term used to describe a gradual increase in the average temperature of the Earth's atmosphere and its oceans, a change that is believed to be permanently changing the Earth's climate. While it changes the Earth’s climate it takes away different species that we depend on and some which other species depend on and also effect (in a bad way) the environment in which we live and can cause permanent damages to humans, animals, plant which will change the whole chain of ecosystem.
Global warming is the gradual rise in temperature and oceans due to recent human activity. This is created by the production of too much carbon dioxide that is released into the earth’s atmosphere. The carbon dioxide, also known as a greenhouse gas, remains in the air trapping heat and gradually warming the planet. Other greenhouse gases such as: methane, nitrous oxide, and water vapor also contribute to this slow warming. According to Live Science, The state of these gases being trapped is called the greenhouse effect, which is one of the leading causes of global warming (Lallanillia). All the gases are created differently and have different effects on the earth. As for some greenhouse gases can be in the atmosphere for a short amount of time, other gases can remain in the atmosphere for thousands of
The common definition of global warming is a gradual increase in the overall temperature of the earth’s atmosphere generally attributed to the greenhouse effect caused by increased levels of carbon dioxide and other pollutants (Global warming, Wikipedia). Moreover, the effects of global warming will bring ecological and social changes. Because there is no exact way to predict the effects of global warming, it is almost impossible to say how strong global warming will affect life in the future. Scientists blame the greenhouse gas effect in combination with societies greenhouse gas emissions for the rising temperature. The greenhouse effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases, and is re-radiated in all directions. Since part of this re-radiation is emitted back towards the earth’s surface and the lower atmosphere, it results in an elevation of the average surface temperature above what it would be in the absence of the gases (Intergovernmental Panel on Climate Change). Simply, global...